<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="UTF-8" />
		<meta http-equiv="X-UA-Compatible" content="IE=edge" />
		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
		<title>选择器</title>
		<style>
			.div {
				position: relative;
				transition-duration: 0.3s;
				margin-bottom: 10px;
				width: 200px;
				height: 100px;
				background-color: #ffaa00;
				content-visibility: auto;
				/* will-change: left, top; */
				will-change: opacity;
			}
			.div:before {
				content: "";
				position: absolute;
				left: -665px;
				top: -460px;
				width: 300px;
				height: 15px;
				background-color: rgba(255, 255, 255, 0.5);
				transform: rotate(-45deg);
				animation: searchLights 2s ease-in 0s infinite;
			}
			@keyframes searchLights {
				0% {
				}
				75% {
					left: -100px;
					top: 0;
					opacity: 0;
				}
				100% {
					left: 120px;
					top: 100px;
					opacity: 1;
				}
			}
		</style>
	</head>
	<body>
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	</body>
	<script>
		// let root = document.createElement("div");
		// for (let i = 0; i < 100000; i++) {
		// 	let dom = document.createElement("div");
		// 	dom.innerText = "hello,word";
		// 	dom.className = "div";
		// 	root.append(dom);
		// }
		// box.append(root);
	</script>
</html>
